6 May 2009 Very longwave infrared (> 14 μm) quantum-dot photodetector
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Abstract
We report a very longwave Infrared (> 14 μm) quantum dot photodetector working at 77 K. Very longwave infrared (VLWIR) detection at a cut-off wavelength of 15.3 μm was achieved through QD size engineering. Peak specific photodetectivity D* of 3.3x108 cmHz1/2/W. A large photoresponsivity of 0.93 A/W and high photoconductive gain of 62.4 were demonstrated at a bias voltage of V = 3.7 V at T = 77 K. The low-bias and liquid nitrogen temperature performance demonstration based on InAs-GaAs material systems indicates that the QDIP technology is promising for VLWIR sensing and imaging.
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Jarrod Vaillancourt, Jarrod Vaillancourt, Xuejun Lu, Xuejun Lu, } "Very longwave infrared (> 14 μm) quantum-dot photodetector", Proc. SPIE 7298, Infrared Technology and Applications XXXV, 72980C (6 May 2009); doi: 10.1117/12.819120; https://doi.org/10.1117/12.819120
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